JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

2026-09-06T06:05:06Z

Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

Neue Seite

__NOINDEX__
'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

== Summary ==
The CM4-DUAL-ETH-MINI is a baseboard for the Raspberry Pi Compute Module 4. It provides two gigabit Ethernet ports, one USB 2.0 port, a fan interface and a standard Raspberry Pi 40-pin GPIO header. The board is powered via a 5 V DC Type-C connector.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL22360 WSAL22360 – Mini Dual Gigabit Ethernet Base Board Designed for Raspberry Pi Compute Module 4]
* [https://shop.jw-tech.eu/p/WSAL23697 WSAL23697 – Mini Dual Gigabit Ethernet Mini-Computer Kit Designed for Raspberry Pi Compute Module 4]
* [https://shop.jw-tech.eu/p/WSAL23852 WSAL23852 – Mini Dual Gigabit Ethernet Mini-Computer Kit Designed for Raspberry Pi Compute Module 4]
* [https://shop.jw-tech.eu/p/WSAL23853 WSAL23853 – Mini Dual Gigabit Ethernet Mini-Computer Kit Designed for Raspberry Pi Compute Module 4]

== Technical overview ==
* Two RJ45 gigabit Ethernet ports: ETHERNET 0 uses the CM4's built-in network port; ETHERNET 1 is a PCIe expansion network port using the RTL8111H chip.
* The 40-pin GPIO header is for connecting various HAT modules.
* The Type-C connector can serve as a 5 V/2.5 A power supply or as an eMMC programming interface; the BOOT switch selects between USB Type-C (ON) and eMMC/Micro SD (OFF).
* A 5 V four-wire fan connector (SH1.0, 4P) supports speed measurement and regulation; only 5 V fans are supported.
* The micro SD card slot allows booting the Compute Module 4 Lite from a micro SD card.
* The SYSTEM switch controls EEPROM_WP (prevents EEPROM overwrite), WiFi_DIS and BT_DIS (relevant only for CM4 versions with antenna).
* PWR and SYS LEDs indicate power status and operating status respectively.
* USB 2.0 is disabled by default; enable it by adding 'dtoverlay=dwc2, dr_mode=host' to config.txt.
* Operating temperature range: -10 to 75 °C.

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
sudo apt-get update && sudo apt-get install python-pip && sudo pip install RPi.GPIO
wget https://files.waveshare.com/upload/e/ee/CM4-DUAL-ETH-MINI-Example.zip && unzip CM4-DUAL-ETH-MINI-Example.zip -d ./CM4-DUAL-ETH-MINI-Example
python main.py # oder python3 main.py im Ordner CM4-DUAL-ETH-MINI-Example/FAN
sudo nano /etc/rc.local # Zeile 'python ../main.py' vor 'exit 0' einfügen für Autostart
sudo apt update && sudo apt upgrade # falls die Netzwerkkarte nicht gefunden wird
cd CM4-DUAL-ETH-MINI-Example/Driver && tar vjxf r8168-8.050.03.tar.bz2 && cd r8168-8.050.03 && sudo ./autorun.sh
</syntaxhighlight>

== Notes and version constraints ==
* Do not confuse: The source text contains placeholders such as {{{name3}}} and {{{userDefinedInfo}}}; these were ignored.
* No PoE support on this expansion board.
* When programming the image via the Type-C connector, do not connect other devices to ensure proper CM4 power supply.
* When using OpenWrt, no technical support is provided outside of hardware; only tutorials and images are available.
* If the I2C address of the RTC/fan controller cannot be found: check whether 'dtparam audio on' is blocked in /boot/config.txt and whether /boot/dt-blob.bin exists.
* When compiling the kernel, the driver kmod-r8169 must be added for the network card.
* Instructions in the source material apply only to the described hardware; other versions may differ.

== Source and revision record ==
* [https://www.waveshare.com/wiki/CM4-DUAL-ETH-MINI CM4-DUAL-ETH-MINI - Waveshare Wiki]
* Source revision: 90306
* Captured: 2026-09-03T03:54:38+00:00
* SHA-256: <code>20859cb148285aa869d950af29ae97f1d0073c1a7b9aae378041792a02dd9ba3</code>

WSAL22360 – CM4-DUAL-ETH-MINI/en - Versionsgeschichte

JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex